@article{10_4153_CJM_1967_057_6,
     author = {Demarr, Ralph},
     title = {On {Partially} {Ordering} {Operator} {Algebras}},
     journal = {Canadian journal of mathematics},
     pages = {636--643},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-057-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-057-6/}
}